ORANGE COUNTY, Calif. - "Avengers: Endgame" fans and other moviegoers who attended late-night screenings at a California theater last week may have been exposed to measles, KNBC-TV and other news outlets are reporting.

"Orange County residents may have been exposed to measles since the ill person visited public locations while infectious," the agency said.

The woman, who is now "under voluntary isolation at home," reportedly visited the AMC Movie Theater at 1001 S. Lemon St. in Fullerton from 11 p.m. April 25 to 4 a.m. April 26. She also went to 5 Hutton Centre Drive in Santa Ana from 7:45 a.m. to 9 a.m. April 23 to 25 and the St. Jude Emergency Department in Fullerton from 7 a.m. to 9 a.m. April 27.

People who went to those locations at the same time as the patient should review their vaccination history and watch for symptoms such as fever or rashes for up to 21 days after they were exposed to the disease, officials said.

"People who have not had measles or the measles vaccine are at higher risk after an exposure, so they should talk with a health care provider about receiving Measles, Mumps and Rubella (MMR) vaccination," the news release said.